wip
Fork of Socket by
TCPSocketConnection.cpp
- Committer:
- emilmont
- Date:
- 2012-07-25
- Revision:
- 3:e6474399e057
- Child:
- 4:75988d748e4d
File content as of revision 3:e6474399e057:
/* Copyright (C) 2012 mbed.org, MIT License * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software * and associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "TCPSocketConnection.h" #include <cstring> using std::memset; using std::memcpy; TCPSocketConnection::TCPSocketConnection() : _closedByRemoteHost(false) { memset(&_remoteHost, 0, sizeof(struct sockaddr_in)); _ipAddress[0] = '\0'; } int TCPSocketConnection::connect(char* host, int port) { if (init(SOCK_STREAM) < 0) return -1; //Resolve DNS address or populate hard-coded IP address struct hostent *server = gethostbyname(host); if (server == NULL) return -1; //Could not resolve address memcpy((char*) &_remoteHost.sin_addr.s_addr, (char*) server->h_addr_list[0], server->h_length); _remoteHost.sin_family = AF_INET; _remoteHost.sin_port = htons(port); if (lwip_connect(_sock_fd, (const struct sockaddr *) &_remoteHost, sizeof(_remoteHost)) < 0) { close(); return -1; } return 0; } int TCPSocketConnection::send(char* data, int length, int timeout) { if ((_sock_fd < 0) || _closedByRemoteHost) return -1; set_timeout(timeout); if (wait_writable() != 0) return -1; int n = lwip_send(_sock_fd, data, length, 0); _closedByRemoteHost = (n == 0); return n; } // -1 if unsuccessful, else number of bytes written int TCPSocketConnection::send_all(char* data, int length, int timeout) { if ((_sock_fd < 0) || _closedByRemoteHost) return -1; size_t writtenLen = 0; set_timeout(timeout); while (writtenLen < length) { // Wait for socket to be writeable if (wait_writable() != 0) return writtenLen; //Timeout -- FIXME should we return -1 or writtenLength ? int ret = lwip_send(_sock_fd, data + writtenLen, length - writtenLen, 0); if (ret > 0) { writtenLen += ret; continue; } else if (ret == 0) { _closedByRemoteHost = true; return writtenLen; //Connection was closed by remote host -- FIXME how do we signal that the connection was closed ? } else { return -1; //Connnection error } } return writtenLen; } int TCPSocketConnection::receive(char* data, int length, int timeout) { if ((_sock_fd < 0) || _closedByRemoteHost) return -1; set_timeout(timeout); if (wait_readable() != 0) return -1; int n = lwip_recv(_sock_fd, data, length, 0); _closedByRemoteHost = (n == 0); return n; } // -1 if unsuccessful, else number of bytes received int TCPSocketConnection::receive_all(char* data, int length, int timeout) { if ((_sock_fd < 0) || _closedByRemoteHost) return -1; size_t readLen = 0; set_timeout(timeout); while (readLen < length) { //Wait for socket to be readable if (wait_readable() != 0) return readLen; //Timeout -- FIXME should we return -1 or writtenLength ? int ret = lwip_recv(_sock_fd, data + readLen, length - readLen, 0); if (ret > 0) { readLen += ret; } else if (ret == 0) { _closedByRemoteHost = true; return readLen; //Connection was closed by remote host -- FIXME how do we signal that the connection was closed ? } else { return -1; //Connnection error } } return readLen; } char* TCPSocketConnection::get_address() { if (_ipAddress[0] == '\0') { if (_remoteHost.sin_addr.s_addr == 0) return NULL; inet_ntoa_r(_remoteHost.sin_addr, _ipAddress, sizeof(_ipAddress)); } return _ipAddress; } int TCPSocketConnection::get_port() { return ntohs(_remoteHost.sin_port); } TCPSocketConnection::~TCPSocketConnection() { close(); //Don't want to leak }